Green building defines as the practice of creating structures and using processes that are environmentally responsible and resource efficient throughout a building’s life cycle from site selection to design, construction, operation, maintenance, renovation and deconstruction. Green building is becoming more and more popular because they are considered as environment friendly building. Different rating systems are used for rating the green buildings. India has three systems of green homes ratings, they are 1) GRIHA (Green Rating for Integrated Habitat Assessment), 2) IGBC- Indian Green Building Council (LEED) and 3) BEE (Bureau of Energy Efficiency). Every time new construction of buildings are focused and studied to achieve the required points of sustainable habitats. But there is lots of building which are actually constructed without considering the green building concept. So with the help of LEED India rating system, existing building is focused and studied to reduce primary energy and water demands. We can increase the potential of resource efficiency in existing buildings to reduce consumption, optimize operational and maintenance cost and by adding more of indoor comforts to the occupants. This would help the existing building in rising towards higher levels of sustainability and get rated by LEED India rating system.